Toasty Toes Warmawear Battery Heated Socks - Small / Medium Ultra efficient carbon-ceramic infra-red heating element for targeted toe toasting Flexible cable means you can position the battery box above a ski boot or welly 2 Heat settings so you can select the best setting for your feet. Max temperature 100F Washable (on a 86F/ 30C gentle program) **Please note this listing is for the small/medium size socks**